Joyetech eVic VT is absolutely a fantastic box mod appearing in e-cig industry and its two temp control modes bring you a distinctive and super enjoyable vaping experience. However, it seems to be inevitable that there appear some issues during vaping on eVic VT. When you get this stuff, you may can not wait to try its temp control function, such as to set the temperature at 250C / 60W, and it really worked beautifully for almost a day until you have to refill some juice. However, it is unfortunate that the device just keeps displaying "protection" and produces little or no vapor at all, constantly reducing the wattage while firing. So you have to switch the mode into VW mode to have it work. Actually in VT mode, if the temperature of coils is higher than the set temperature, the device will automatically show protection and the wattage changes to meet the set temperature. So it is a normal sign. To kindly operate your eVic VT, you should not constantly hit it on high temperature and continue to enjoy vaping until it becomes cool again, this practice will also help protect your device from being earlily damaged.